Question about 1997 Cadillac Eldorado

2 Answers

Location of coolant temperature sensor and location of fan coolant relay switch

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  • Cadillac Master
  • 6,826 Answers

Removal & Installation To Remove:

  1. Before servicing the vehicle refer to the precautions at the beginning of this section
  2. Remove or disconnect the following:
    • Engine coolant into a suitable container to a level below the ECT sensor location of coolant temperature sensor and - gm_car_cad_sev_ect_loc.gif

    • ECT sensor harness connector (A)
    • ECT sensor
To Install:
NOTE: Use care when handling the coolant sensor. Do not drop damage to the coolant sensor will affect the operation of the fuel control system.
NOTE: Replacement components must be correct for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque which may affect the operation of the component. Use the correct torque specification when installing components to avoid damage.
  1. Coat the sensor threads with GM P/N 1050805 sealer or equivalent
  2. Install or connect the following:
    • ECT sensor
      1. Torque to: 15 lb-ft. (20 Nm)
    • ECT sensor harness connector
    • Engine coolant
  3. Start the engine then idle until normal operating temperature is attained.
  4. Recheck coolant level and top off as needed.
  5. Test drive the vehicle.
--- I couldn't find a reference for the 'fan coolant relay switch' although I'm sure there is one on this car.

Posted on Sep 01, 2010

  • notorious_hb Sep 01, 2010

    Thank you for the help but this tells me how to install the sensor, not the location.

  • Duane Wong
    Duane Wong Sep 02, 2010

    If you click on the "x" link, it has a diagram where the cts installs.

    It's like on the left (driver's side) hand side on the back side of the engine, underneath

    the fuse box.

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  • Contributor
  • 23 Answers

On the 89 Eldorado the coolant sensor is located behind the distributor on the drivers side as you are standing in front of the car, The cooling fan relay is inside a grey plastic box under the hood on the passenger side fender.

Posted on Nov 05, 2013

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Posted on Jan 02, 2017

  • 221 Answers

SOURCE: coolant temperature relay switch

Most vehicles use a coolant temperature sensor which is located near the thermostat directly connected into the coolant line, or near the thermostat housing, there are relays for the cooling fan which is usually located in the power distribution box under the hood.

Posted on Mar 16, 2009

  • 2 Answers

SOURCE: 99 cadillac de ville

the coolant temp sensor is at the rear of the engine and is a "bad word" to get to. the 3 relays are at the bottom,under the fans. if you remove the driver side fan out of the way( 2 10mm bolts holding the fan) you should have good access to them. they do have locks on them and may be tricky to unplug. there is a 7/16 nut holding the relay plate down. remove and it should be easy to remove them.

Posted on Jul 09, 2008

  • 1 Answer

SOURCE: 1997 dodge neon. replaced coolant temperature

1997 Plymouth Neon, have replaced radiator, radiation cap, thermostate and hoses, still run hot. Fans do not seem to come on, where is the temperature sensor on this vehicle?

Posted on Sep 03, 2009

  • 34 Answers

SOURCE: Where is the location of the coolant fan switch

V6 2.8L top right rear of engine. Fan also turns on through A/C pressure switch and coolant temperature sensor, but these should operate independent of the coolant temp switch.
V8 5.0L and 5.7L (Heavy Duty) lower right rear of engine above starter.
Base model V8 uses the coolant sensor (top right of engine) and A/C pressure switches (lower right corner of eng compartment on A/C line to turn on the cooling fan. Fan is energized on all applications through the cooling fan relay.

Posted on Mar 03, 2010

  • 1915 Answers

SOURCE: Electric cooling fan not coming on. What activates

It is activated by what is called a VCRM (variable control relay module) located on the front of the radiator, drover side-it is a finned-looking box (silver) and it performs a number of functions, including controlling the radiator fan, the injectors and the AC compressor clutch. They can be found on ebay, and I have extras (good to have, hard to find).

Posted on Mar 03, 2011

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